SEL-2890 Instruction Manual
Date Code 20210715
Firmware Upgrade Instructions
Upgrade Procedure
B.2
Upgrade Procedure
The instructions below assume you have a working knowledge of your personal
computer terminal emulation software. In particular, you must be able to modify your
serial communications parameters (data rate, data bits, parity, etc.), disable any
hardware or software flow control in your computer terminal emulation software, and
transfer files (e.g., send text files).
Step 1.
Connect the personal computer to the SEL-2890 transceiver serial
port via the SEL-C663 or SEL-C642 programming cable and remove
the Ethernet cable from the transceiver.
NOTE:
If you disconnect the Ethernet cable (firmware
versions R104 and newer), the SEL-2890 forces the
communications speed to 19200 bps. The factory-default
communications speed is 19200 bps (for firmware
versions R101–R103, the default speed is 38400 bps).
Step 2.
Establish a serial Console session by entering
AT+++
in the terminal
window.
Step 3.
Go to Access Level 2 by using the
2AC
command and entering the
appropriate password.
Step 4.
Execute the Show (
SHO
) command to retrieve the transceiver
settings. Record the displayed settings (or save them to a computer
file) for possible re-entry after the firmware upgrade.
Issue the Password (
PAS
) command and save the original password
settings in case they are needed later.
Normally, the transceiver will preserve the settings during the
firmware upgrade. However, depending on the firmware version that
was previously installed and the use of transceiver memory, this
cannot be ensured. Saving settings is always recommended. If
settings are lost because of the firmware upgrade, the transceiver
defaults to a data rate of 19200 bps. It is recommended that firmware
be downloaded at 19200 so that messages will be properly displayed
if the settings are lost.
Step 5.
Set flow control to software (FLOW=Software) by using the
SET
command if necessary. Saving settings will require re-establishing the
serial console, because it is closed after each settings save.
Step 6.
Go to Access Level 2 by using the
2AC
command and entering the
appropriate password.
Step 7.
Issue the
L_D <Enter>
command to the transceiver to start the
firmware upgrade procedure.
Step 8.
Type
Y <Enter>
to the
This command will erase current
firmware. Continue (Y, N)?
prompt.
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